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(11)

EP 4 381 117 A1

(12)

(43) Date of publication: 12.06.2024 Bulletin 2024/24 (21) Application number: 22747359.2 (22) Date of filing: 04.08.2022

(51) International Patent Classification (IPC):  C25B 1/04(2021.01) C25B 9/73(2021.01) C25B 9/19(2021.01) C25B 9/77(2021.01) (52) Cooperative Patent Classification (CPC): C25B 1/04; C25B 9/19; C25B 9/73; C25B 9/77; Y02E 60/36 (86) International application number: PCT/EP2022/071986 (87) International publication number: WO 2023/012288 (09.02.2023 Gazette 2023/06)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 05.08.2021 EP 21189863 (71) Applicant: Industrie De Nora S.P.A. 20134 Milano (IT)	(72) Inventors: NUZZO, Daniele 20134 Milan (IT) LIUZZO, Mirko 20134 Milan (DE) PEREGO, Michele 20134 Milan (IT) (74) Representative: Reitstötter Kinzebach  Patentanwälte Sternwartstraße 4 81679 München 81679 München (DE)